Hello I'm a 2nd year in my uni and I need help with creating the most disgusting porridge for the 1st course innitiation as well as think of some challenges they will have to do.

The plan is as follows:
teams of first courses come to my station where I have prepared a ready made basic porridge - oats/water/sugar
then I pick 2 people at random and make them turn around and make them pick 4 ingredients that will go in to each of their porridge, they don't know the ingredients and can only say yes or no.
Once both of them have picked I draw a paper that has a challenge they both have to participate in, the winner gets to swap out any ingredients from the losers pile

where I need your help is creating the challenges and various foods to put in the porridge, as much as I'd like to create a hair cake for them to eat it needs to be food safe, go wild, go crazy, go stupid